I hope for their sakes they're all smart enough to know that, once the show ends, they'll never have this level of success again, and have invested 90% of their pay. Oh, and for our sakes, I hope they're self-centered enought that they don't spend their millions trying to influence elections.
Oh, saints preserve us. Galecki was smart enough not to make any comment about Roseanne Barr's fatal tweet, except his tweet of a kinda generic photo illustration of people of many races, with a little heart. Pretty good fence-straddling, there.